Slurry screeding mechanism and coating and screeding apparatus used in production process of sg abrasive

ABSTRACT

Disclosed is a slurry screeding mechanism used in the production process of the SG abrasive. The slurry screeding mechanism includes a screeding main support; a screeding plate which is connected with the screeding main support through a suspension component so that the screeding plate is suspended, and a damping spring is arranged in the suspension component; and a torsion spring adjusting component, wherein the torsion spring adjusting component includes a plurality of torsion springs supported by a torsion spring support shaft; the torsion spring support shaft is fixed on the screeding main support; the torsion spring support shaft can move up and down relative to the screeding main support; the torsion springs are clamped in a V-shaped plate; an end side of the V-shaped plate is connected with the screeding main support; and a side surface of the V-shaped plate is connected with the screeding plate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No.201910791204.4 with a filing date of Aug. 26, 2018. The content of theaforementioned applications, including any intervening amendmentsthereto, are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the field of production of abrasive,and particularly relates to a slurry screeding mechanism and a coatingand screeding apparatus used in a production process of SG abrasive.

BACKGROUND OF THE PRESENT INVENTION

In 1981, the Industrial Abrasive Department of 3M Company in the UnitedStates released ceramic corundum abrasive named “Cubitron”. Itstoughness was more than 2 times that of ordinary corundum, and itsgrinding performance was better than that of most ordinary abrasive. In1986, Norton Company developed an SG abrasive which was also ceramiccorundum abrasive, and its performance was similar to that of Cubitronabrasive. In fact, both kinds of abrasives are manufactured by achemical ceramic process commonly known as Sol-Gel (SG) process. The SGabrasive is therefore named. A working process includes: preparinghydrosol of Al₃O₂.H₂O, gelling the resulting hydrosol, drying andsolidifying, then breaking into particles, and finally sintering theparticles to obtain abrasive. Since a crystal seeding agent (or seedcrystal) is normally used in the Sol-Gel process, the SG process is alsonamed “seeded gel process”. In 1980s, the SG process was used to producethe abrasive. An SG abrasive grinding tool began to be used in the fieldof industrial processing. At present, the artificial abrasive availablein the market is mainly classified into two types, i.e. corundumabrasive and silicon carbide abrasive. Compared with the ordinarycorundum abrasive, the new generation SG abrasive having the advantagesof high hardness, good flexibility and high sharpness has thesuperiorities of high abrasive ratio, high shape preserving performance,good workpiece surface processing quality, small trimming amount of anabrasive wheel, and high grinding efficiency. Therefore, the massproduction of the SG abrasive is very important for prolonging theservice life of the abrasive wheel, improving the surface quality of aworkpiece and promoting the innovation of the abrasive wheel. However,the SG abrasive in China is low in industrialization production degree,so it is urgent to accelerate its application progress. The prior art ishigh in cost and has the defects that the produced SG abrasive is low inrate of finished products, incomplete in abrasive shape, poor in surfacemorphology and high in production cost.

Through searching, in “transfer assisted screen printing method ofmaking shaped abrasive particles and the resulting shaped abrasiveparticles” (Patent Number: 201510188931.3), invented byDennis•G•Welygan, Wight•D•Erickson, and John-T-Boden: firstly abreathable release liner is placed on a plastic grid of a vacuum box,and then the vacuum is turned on. The air flow causes the liner to suckdown to the top of the vacuum box. The printing screen is then placed ontop of the release liner. A liberal amount of gel is placed on top of apatterned screen and was screeded into the apertures using an 8″ (20 cm)wide flexible steel scraper. The vacuum increases to about 5.5″ Hg (0.73kPa) after filling the printing screen apertures, indicating that theair flow through the breathable release liner increases. As the vacuumis still turned on, the printing screen is removed from the airpermeable receiving surface, thereby coating the surface with screenprinted substances. The vacuum is turned off and the receiving surfacewith the wet screen printed substances is removed from the top of thevacuum box. The receiving surface with the screen printed substances isallowed to dry at 45° C. for 1 hour, and then the precursor shapedabrasive particles could be easily scraped off from the receivingsurface without damaging the particles. Multiple batches of precursorshaped abrasive particles are made in this way and collected to providesufficient quantities for firing and subsequent testing.

The method for preparing the abrasive is high in production efficiency;however, since the cooperation between the receiving surface and thevacuum box is not easy to control, the feasibility is not high, and thereceiving surface may also reduce the surface flatness of the abrasive;and moreover, in the process of placing the gel on the top of thepatterned screen, the volume of the gel cannot be accurately controlled,which influences the subsequent filling process.

Through searching, Dennis•G•Welygan, Charles•J•Stutina IV. et alinvented a laser method for preparing shaped ceramic abrasive, shapedceramic abrasive and an abrasive product (patent number:201180050166.9). If necessary, ceramic precursor particles in variousshapes may be generated by cutting patterns. The particles may be keptin a combination state or may be separated through the shapes (forexample through screening). In some embodiments, laser may be aligned ata ceramic precursor material layer, so that incisions are basicallyperpendicular to an exposed surface. In some embodiments, laser may bealigned at a ceramic precursor material layer, so that incisionsbasically form an angle relative to the exposed surface. The ceramicprecursor material layer with notches is broken along notch lines,thereby obtaining the shaped ceramic precursor particles.

Through the method, the abrasive in various shapes may be obtained, andthe production efficiency is high, but the laser cutting method is highin cost; and the ceramic precursor material is broken along notch linesto obtain the abrasive, thereby causing rough edges and poorcompleteness of the abrasive.

In conclusion, the existing abrasive production apparatus cannotaccurately control the supply amount of slurry; and the producedabrasive is poor in shape completeness, which reduces the performance ofan abrasive product. Due to the problems of a belt mold or themanufacturing and assembling accuracy, the subsequent rigid screedingmechanism is easy for damaging the mold or machine; and on the otherhand, when filling the slurry, surplus slurry may be accumulated infront of the screeding mechanism, thereby hindering the subsequentfilling process.

SUMMARY OF PRESENT INVENTION

To overcome the defects of the prior art, the present invention providesa slurry screeding mechanism used in a production process of SGabrasive, which fully fills a mold cavity with slurry on a belt mold toobtain a complete abrasive structure on the premise of not damaging thebelt mold.

A specific technical solution of the slurry screeding mechanism used inthe production process of the SG abrasive is as follows:

A slurry screeding mechanism used in the SG abrasive production processincludes:

a screeding main support;

a screeding plate, wherein the screeding plate is connected with thescreeding main support through a suspension component, so that thescreeding plate is suspended, and a damping spring is arranged in thesuspension component, and

a torsion spring adjusting component, wherein the torsion springadjusting component includes a plurality of torsion springs supported bya torsion spring support shaft, the torsion spring support shaft isfixed on the screeding main support, the torsion spring support shaftcan move up and down relative to the screeding main support, the torsionsprings are clamped in a V-shaped plate, an end side of the V-shapedplate is connected with the screeding main support, and a side surfaceof the V-shaped plate is connected with the screeding plate.

In the above slurry screeding mechanism, the damping springautomatically adjusts pressure applied to the belt mold, and the slurryon the belt mold is fully filled to a mold cavity without damaging thebelt mold to obtain a complete abrasive structure; and by arranging thetorsion spring adjusting component, the screeding mechanism is uniformin application of lateral force.

Further, the screeding plate includes a triangular support plate and ascraping plate fixed on a lower portion of the triangular support plate.A long edge of the triangular support plate is arranged along a lengthdirection of the screeding main support. The scraping plate is aV-shaped scraping plate and arranged on lower portions of two shortedges of the triangular support plate. A bottom side of the scrapingplate is a plane. A longitudinal section of the scraping plate is arectangle with a missed angle on one side, so that the shape of thebottom surface of the scraping plate in contact with the slurry is firsta slope and then a plane, the slope can squeeze a coated slurry layerinto the mold cavity of the belt mold, and the plane can compact andlevel each mold cavity.

The scraping plate is in a V shape, so that the slurry in front of thescreeding mechanism can be led to both sides, and the slurry can beprevented from accumulating and influencing the filling work. The bottomsurface of the scraping plate is a plane. The bottom surface of thescraping plate is parallel to the belt mold. The scraping plate isconnected with the triangular support plate through a bolt. A totallength of the scraping plate and the triangular support plate isadjusted by the bolt so as to control the adjusting amount of thedamping spring.

Further, the suspension component includes a suspension connectingmember connected with the screeding main support. A height of thesuspension connecting member is adjustable. The damping spring isarranged below the suspension connecting member.

Further, the damping spring is arranged in a damping spring seat. Thetop of the damping spring seat is connected with the suspensionconnecting member, and the bottom of the damping spring seat isconnected with the screeding plate.

The suspension connecting member includes a suspension outer sideconnecting member and a suspension inner side connecting member embeddedin the suspension outer side connecting member. The suspension outerside connecting member is connected with the screeding main support. Thebottom side of the suspension inner side connecting member is connectedwith the top of the damping spring seat. One of the suspension outerside connecting member and the suspension inner side connecting memberis provided with a slotted hole, and the other one is provided with aplurality of bolt holes. The bolts penetrate through the slotted holeand the bolt holes to connect the suspension outer side connectingmember and the suspension inner side connecting member; and moreover,the height of the suspension connecting member is adjusted throughdifferent bolt holes.

Further, the V-shaped plate includes a torsion spring adjusting plateand a torsion spring baffle plate hinged with the torsion springadjusting plate. The torsion spring baffle plate is arranged below thetorsion springs. The torsion spring baffle plate is connected with thescreeding plate. The torsion spring adjusting plate is connected withthe torsion spring baffle plate through a hinge.

The screeding main support is provided with a longitudinal guide rail.The longitudinal guide rail is arranged at both sides of the screedingmain support and is vertically arranged. The longitudinal guide rail issleeved with a longitudinal slide block. The longitudinal slide block isconnected with a longitudinal adjusting plate which is verticallyarranged. The longitudinal adjusting plate is connected with an endportion of the torsion spring adjusting plate. Both ends of the torsionspring support shaft are connected with the longitudinal adjustingplate. When a total length of the suspension component is changed, thetorsion spring adjusting component may move up and down under a guidingeffect of the longitudinal guide rail. One end of the torsion springcontacts the torsion spring adjusting plate, and the other end contactsthe torsion spring baffle plate. Under the effect of the torsionsprings, the scraping plate is uniform in stress, so that the slurry ismore uniformly filled into the mold cavity.

The present invention also provides a slurry coating and screedingapparatus used in a production process of SG abrasive. The slurrycoating and screeding apparatus integrates three functions of slurrycoating, slurry filling and residue cleaning. An injector coatingapparatus is used to realize the quantitative and accurate coating ofthe slurry. A slurry filling apparatus is used. A residue cleaningmechanism is added and utilizes an extension spring and a cleaning plateto clean a residual slurry layer on the surface of a mold.

A slurry coating and screeding apparatus used in the production processof the SG abrasive includes:

an injector coating mechanism which stretches across a belt moldtransfer line and includes an injector for injecting slurry to a beltmold; and

a screeding mechanism, wherein the screeding mechanism is arranged atone side of the injector coating mechanism, and the screeding mechanismis also disposed along the belt mold transfer line.

In the above slurry coating and screeding apparatus, the injectorcoating mechanism uniformly and rapidly coats the prepared abrasiveslurry onto the belt mold. The screeding mechanism is used to screed thecoated slurry, so that the mold cavity is fully filled with the slurryto realize the continuous operation.

Further, to prevent the residual slurry layer from remaining on thesurface of the belt mold after the action of the screeding mechanism,the residue cleaning mechanism is especially arranged. The slurrycoating and screeding apparatus used in the production process of the SGabrasive further includes a residue cleaning mechanism. The screedingmechanism is arranged between the injector coating mechanism and theresidue cleaning mechanism. The residue cleaning mechanism is arrangedat one side of the screeding mechanism. The residue cleaning mechanismincludes a cleanser support frame which stretches across the belt moldtransfer line. The cleanser support frame supports a cleanser.

Further, the cleanser includes a cleaning plate with a bottom capable ofcontacting the belt mold. The cleaning plate is connected with acleaning moving component through the extension spring. The cleaningmoving component is connected with a cleaning lifting componentsupported by the cleanser support frame. The cleaning moving componentdrives the cleaning plate to move along a width direction of the beltmold. The cleaning lifting component drives the cleaning plate to riseand fall.

The cleaning moving component includes a cleanser guide rail installedon the cleanser support frame and a cleanser lead screw nut pair. Thecleanser guide rail is horizontally disposed. The cleanser guide rail issleeved with a cleanser slide block. The cleanser lead screw nut pairincludes a lead screw connected with a power source. The lead screw issleeved with a lead screw nut. The lead screw nut is connected with thecleanser slide block, so that when the lead screw rotates, the leadscrew nut drives the cleanser slide block to move relative to thecleanser support frame, and the cleanser can move along a lengthdirection of the belt mold. The cleaning lifting component may be a leadscrew nut lifting mechanism or other mechanisms capable of rising andfalling. The cleaning lifting component is connected with the cleanserguide rail; in an advancing process, the cleanser moves down to cleanresidues; and in a return process, the cleanser moves up.

Furthermore, the size of the bottom end of the cleaning plate is smallerthan the sizes of the middle end and upper end of the cleaning plate.The upper end of the cleaning plate is connected with a cleaningconnecting plate. Both sides of the upper surface of the cleaningconnecting plate are provided with the extension springs respectively.One end of the extension spring is connected to a hinge bolt below thecleanser slide block in a suspension manner. By arranging the extensionsprings, the acting force of the cleaning plate applied to the surfaceof the belt mold can be adjusted in time. The cleaning plate works alongone direction. In a working process, the cleaning plate is in directcontact with the belt mold, so that the residual slurry on the surfaceof the belt mold can be scraped off. Under the action of the extensionsprings, the cleanser can automatically adjust a scraping and cleaningforce to clean the residual slurry on the premise of protecting the beltmold.

Further, the injector coating mechanism includes an injector supportframe. The injector support frame supports the guide rail. The injectoris installed on the guide rail. The guide rail is connected with aninjector lifting component. The guide rail is connected with an injectorhorizontal moving component.

Further, the injector includes an injector cylinder connected with theguide rail. The side portion of the injector cylinder is provided with aslurry inlet. The slurry can be fed in time according to a residualamount of the slurry inside the injector cylinder. The bottom side ofthe injector cylinder is provided with a slurry outlet. An injectorpiston is arranged in the injector cylinder. The injector piston isconnected with a rectilinear propelling component. The rectilinearpropelling component is a ball screw nut pair, so that a coating processis stable and rapid, and the feed amount of the slurry can be accuratelycontrolled.

The injector lifting component includes two groups of lead screw nutpair lifting mechanisms. Lead screws on the left side and right side areconnected with a motor 2 fixing block and a synchronous belt positioningblock respectively, so that the rotation of the motor can be convertedto the up-down movement of the guide rail. The injector horizontalmoving component is also a lead screw nut pair horizontal movingmechanism. The lead screw of the injector horizontal moving component isparallel to the guide rail. A lead screw nut of the injector horizontalmoving component is an injector support slide block. The injectorcylinder is connected with the injector support slide block through aninjector lower framework.

Or, in another solution, the screeding mechanism may be replaced as afirst screeding mechanism including a screeding main support and ascreeding plate. The screeding plate is connected with the screedingmain support through a suspension component, so that the screeding plateis suspended. A damping spring is arranged in the suspension component.The structure of the screeding plate and the screeding main support isthe same as the structure of the screeding mechanism.

Compared with the prior art, the present invention has the beneficialeffects as follows:

1) According to the present invention, by arranging the slurry screedingmechanism, the damping spring can automatically adjust the pressureapplied onto the belt mold, and the damping spring can play a role inflexibly controlling the connection of the screeding plate andpreventing the surface and mold cavity of the belt mold from beingdamaged. More importantly, the flexible adjustment can well protect thecompleteness of the abrasive shape, so that the slurry on the belt moldcan be fully filled into the mold cavity to obtain a complete abrasivestructure without damaging the belt mold.

2) According to the present invention, by arranging the torsion springadjusting component, the lateral force applied by the screedingmechanism is uniform, so that the mold or machine can be prevented frombeing damaged, and the service life of the apparatus can be prolonged.

3) According to the present invention, by arranging the V-shapedscraping plate, the slurry in front of the screeding mechanism is led toboth sides to prevent the slurry from accumulating and influencing thefilling work; and moreover, by virtue of the bottom surface of thescraping plate, the filling is carried out prior to the compaction whenin work, so that the obtained abrasive particles are good in shapecompleteness, and the product performance can be improved.

4) According to the present invention, by arranging the cleaningmechanism, in the working process, the cleaning plate is in directcontact with the belt mold, so that the residual slurry layer on thesurface of the belt mold can be scraped off, the residual slurry can beprevented from being mixed with the abrasive particles after beingsolidified and from increasing the difficulty in separating the abrasiveparticles. Under the action of the extension springs, the cleaning platecan automatically adjust a scraping and cleaning force to clean theresidual slurry on the premise of protecting the belt mold.

5) According to the present invention, by arranging the coating andscreeding mechanism, the coating, screeding filling and the work of thecleanser are separately carried out, and each workstation is convenientto adjust. The structure design is reasonable, the feasibility is high,and the production is easy to implement. The produced abrasive is highin shape completeness, and the performance of the abrasive product isimproved. Moreover, by arranging the damping spring and the torsionsprings, the service life of the apparatus is long.

DESCRIPTION OF THE DRAWINGS

The drawings of the description which form one part of the presentinvention are used for the further understanding of the presentinvention. The exemplary embodiments of the present invention and thedescription thereof are used to explain the present invention, and donot constitute improper limitation to the present invention.

FIG. 1 is an assembly diagram of a slurry coating and screedingapparatus in embodiment 2 of the present invention;

FIG. 2 is an isometric drawing of an injector coating mechanism inembodiment 2 of the present invention;

FIG. 3 is a front view of an injector left side support frame inembodiment 2 of the present invention;

FIG. 4 is a front view of an injector right side support frame inembodiment 2 of the present invention;

FIG. 5 is an exploded view of an injector lifting component inembodiment 2 of the present invention;

FIG. 6 is an exploded view of a synchronous belt control component inembodiment 2 of the present invention;

FIG. 7 is an isometric drawing of a motor 2 fixing block in embodiment 2of the present invention;

FIG. 8 is an isometric drawing of a synchronous belt positioning blockin embodiment 2 of the present invention;

FIG. 9 is an exploded view of a synchronous belt positioning componentin embodiment 2 of the present invention;

FIG. 10 is a sectional view of connection between a lead screw and aguide rail in embodiment 2 of the present invention;

FIG. 11 is a front view of an injector support frame in embodiment 2 ofthe present invention;

FIG. 12 is an exploded view of an injector support slide block and atransverse guide rail in embodiment 2 of the present invention;

FIG. 13(a) is a front view of an injector support slide block inembodiment 2 of the present invention;

FIG. 13(b) is a side view of an injector support slide block inembodiment 2 of the present invention;

FIG. 13(c) is a schematic diagram of an inner side of an injectorsupport slide block in embodiment 2 of the present invention;

FIG. 14 is an exploded view of an injector in embodiment 2 of thepresent invention;

FIG. 15 is a full sectional view of an injector in embodiment 2 of thepresent invention;

FIG. 16(a) is a side view of an injector lower framework in embodiment 2of the present invention;

FIG. 16(b) is a half sectional view of a section A-A in FIG. 16(a) ofthe injector lower framework in embodiment 2 of the present invention;

FIG. 17 is an isometric drawing of an injector upper framework inembodiment 2 of the present invention;

FIG. 18 is an isometric drawing of an injector cylinder plug inembodiment 2 of the present invention;

FIG. 19 is an isometric drawing of an injector cylinder in embodiment 2of the present invention;

FIG. 20 is an isometric drawing of a thrust bearing seat in embodiment 2of the present invention;

FIG. 21 is an isometric drawing of an injector piston in embodiment 2 ofthe present invention;

FIG. 22 is an isometric drawing of a first screeding mechanism inembodiment 1 of the present invention;

FIG. 23 is an exploded view of a screeding plate and a suspensioncomponent in embodiment 1 of the present invention;

FIG. 24 is an isometric drawing of a suspension outer side connectingmember in embodiment 1 of the present invention;

FIG. 25 is an isometric drawing of a suspension inner side connectingmember in embodiment 1 of the present invention;

FIG. 26 is a full sectional view of a first screeding mechanism and asuspension component in embodiment 1 of the present invention;

FIG. 27 is an isometric drawing of a damping spring in embodiment 1 ofthe present invention;

FIG. 28 is a front view of a triangular support plate in embodiment 1 ofthe present invention;

FIG. 29 is a front view and a sectional view of a scraping plate inembodiment 1;

FIG. 30 is a schematic diagram of a slurry filling process in embodiment1 of the present invention;

FIG. 31 is an assembly diagram of a second screeding mechanism inembodiment 1 of the present invention;

FIG. 32 is an isometric drawing of a second screeding plate and a leadscrew guide rail group in embodiment 1 of the present invention;

FIG. 33 is an exploded view of a second screeding plate and a lead screwguide rail group in embodiment 1 of the present invention;

FIG. 34 is an assembly diagram of a residue cleaning mechanism inembodiment 2 of the present invention;

FIG. 35 is an exploded view of a residue cleaning mechanism inembodiment 2 of the present invention;

FIG. 36 is an isometric drawing of a residue cleaning mechanism inembodiment 2 of the present invention; and

FIG. 37 is an isometric drawing of a residue cleaning mechanism supportframe in embodiment 2 of the present invention.

In the figures:

I: injector coating apparatus; II: slurry screeding mechanism;

I-1: injector support frame; I-2: injector, I-1-1: injector left sidesupport frame angle plate bolt; I-1-2: injector left side support frameangle plate; I-1-3: guide rail 1; I-1-4: lead screw nut 1; I-1-5:rectilinear bearing; I-1-6: rectilinear bearing fixing ring 1; I-1-7:motor 2 fixing block; I-1-8: coupler 1; I-1-9: motor 1 fixing platebolt; I-1-10: motor 1; I-1-11: support frame sectional bar, I-1-12:support frame angle support bolt; I-1-13: support frame angle support;I-1-14: lead screw support seat 1; I-1-15: synchronous belt positioningblock; I-1-16: synchronous belt positioning wheel; I-1-17: motor 1positioning plate; I-1-18: pin shaft and split pin; I-1-19: tighteningscrew 1; I-1-20: lead screw; I-1-21: lead screw nut fixing screw;I-1-22: rectilinear bearing 2; I-1-23: rectilinear bearing fixing ring2; I-1-24: tightening screw 2; I-1-25: synchronous belt pulley; I-1-26:motor 2; I-1-27: guide rail 3; I-1-28: injector support slide block;I-1-29: synchronous belt; I-1-30: injector support slide block bolt;I-1-31: transverse support sectional bar, I-1-32: rectilinear bearing 3;

I-2-1: motor 3; 1-2-2: motor fixing bolt; I-2-3: injector upperframework; I-2-4: coupler 2; I-2-5: upper framework bolt; I-2-6: upperfixing ring bolt of injector lead screw; I-2-7: upper fixing ring ofinjector lead screw; I-2-8: thrust bearing; I-2-9: thrust bearing seat;I-2-10: injector lead screw nut; I-2-11: lower retainer ring of injectorlead screw nut; I-2-12: injector lower framework; I-2-13: injectorcylinder plug; I-2-14: injector cylinder, I-2-15: injector piston;I-2-16: push rod; I-2-17: lower retainer ring of injector lead screwnut; I-2-18: sealing ring of thrust bearing; I-2-19: injector leadscrew; I-2-20: rubber ring; I-2-21: slurry,

II-1: screeding plate and suspension component; II-2: screedingmechanism main support; II-1-1: suspension outer side connecting member,II-1-2: suspension outer side connecting member bolt 1; II-1-3:suspension inner side connecting member bolt; II-1-4: suspension innerside connecting member; II-1-5: damping spring top seat; II-1-6: dampingspring rubber sheet; II-1-7: damping spring; II-1-8; spring seat;II-1-9: spring seat support block; II-1-10: damping spring tail seat;II-1-11: damping spring screw; II-1-12: triangular support plate bolt;II-1-13; triangular support plate; II-1-14: scraping plate;

II-2-1: screeding mechanism support plate; II-2-2: longitudinal guiderail fixing bolt;

III-1: belt mold; III-2: mold release agent; III-3: slurry;

IV-1: screeding mechanism 2 main support; IV-2: screeding plate andsuspension component 2 assembly;

IV-2-1: longitudinal guide rail fixing sectional bar; IV-2-2:longitudinal guide rail fixing bolt; IV-2-3: longitudinal slide block;IV-2-4: longitudinal guide rail; IV-2-5: longitudinal adjusting plate;IV-2-6: longitudinal adjusting plate bolt; IV-2-7: torsion spring baffleplate bolt; IV-2-8: sleeve; IV-2-9: triangular support frame; IV-2-10:torsion spring baffle plate; IV-2-11: torsion spring; IV-2-12: hinge;IV-2-13: torsion spring adjusting plate; IV-2-14: torsion springadjusting plate bolt; IV-2-15: torsion spring support shaft; IV-2-16:angle plate;

V-1: cleanser support frame; V-2: cleanser; V-1-1: lead screw supportseat; V-1-2: lead screw nut fixing plate; V-1-3: lead screw 2; V-1-4:cleanser lifting component; V-1-5: coupler 2; V-1-6: motor 4 fixingplate; V-1-7: motor 4; V-1-8: residue cleaning mechanism supportsectional bar; V-2-1: cleanser guide rail; V-2-2: cleanser slide block;V-2-3: hinge plate; V-2-4: hinge bolt; V-2-5: cleanser lead screw;V-2-6: cleanser transverse lead screw nut fixing plate; V-2-7: cleaningplate connecting plate; V-2-8: extension spring; V-2-9: cleaning plateconnecting plate bolt; V-2-10: cleanser transverse lead screw nut;V-2-11: cleanser transverse lead screw nut bolt; V-2-12: cleaning plate;V-2-13: spring hinge pin; V-2-14: cleanser transverse lead screw fixingsectional bar 1; V-2-15: motor 6 fixing plate; V-2-16: motor 6; V-2-17:cleanser connecting sectional bar; V-2-18: cleanser transverse leadscrew support seat; and V-2-19: cleanser transverse lead screw fixingsectional bar.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

It should be noted that the following detailed description is exemplaryand is intended to provide further description of the present invention.Unless otherwise specified, all technical and scientific terms usedherein have the same meanings as generally understood by those ordinaryskilled in the art to which the present invention belongs.

It should be noted that the terms used herein are for the purpose ofdescribing specific embodiments only and are not intended to limitexemplary implementation modes according to the present invention. Asused herein, the singular form is also intended to include the pluralform unless otherwise clearly indicated by the context. In addition, itshould be understood that when the terms “contain” and/or “include” areused in the specification, the terms specify the presence of features,steps, operations, devices, components, and/or combinations thereof.

As described in the background, the prior art has the defects. In orderto solve the above technical problems, the present invention proposes aslurry screeding mechanism used in a production process of SG abrasive.The present invention is further illustrated below with reference to thedrawings of the description.

Embodiment 1

In a typical implementation mode of the present invention, a slurryscreeding mechanism used in a production process of SG abrasive, asshown FIG. 22 which is an isometric drawing of a screeding mechanism,includes a screeding plate and a suspension component 11-1 and ascreeding mechanism main support II-2. The screeding mechanism is afirst screeding mechanism.

As shown in FIG. 23 which is an exploded view of the screeding plate andsuspension component, in FIG. 24 which is an isometric drawing of asuspension outer side connecting member, in FIG. 25 which is anisometric drawing of a suspension inner side connecting member, in FIG.26 which is a full sectional view of the screeding mechanism and thesuspension component, in FIG. 27 which is an isometric drawing of adamping spring, in FIG. 28 which is a front view of a triangular supportplate, and in FIG. 29 which is a front view and sectional view of ascraping plate, the suspension outer side connecting member I-1-1 isfixed on a screeding mechanism support plate II-2-1 formed by alongitudinal guide rail fixing sectional bar through a longitudinalguide rail fixing bolt I-2-2. The screeding mechanism support plateII-2-1 is in a door shape. An inner side connecting member bolt 1 of thesuspension component II-1-4 is connected with the suspension outer sideconnecting member II-1-1 through a suspension outer side connectingmember bolt 1 II-1-2, and the tightness of the suspension outer sideconnecting member bolt 1 is adjusted so as to adjust relative positionsof the two connecting members, i.e. a total length of the two connectingmembers. A damping spring seat includes a damping spring top seat and adamping spring bottom seat. A lower end of the suspension inner sideconnecting member bolt 1 II-1-4 is connected with the damping spring topseat II-1-5 through a suspension outer side connecting member bolt 2II-1-3. A damping spring rubber sheet II-1-6 is installed at the innerside of the damping spring top seat II-1-5. A damping spring tail seatII-1-10 is installed at the inner side of the damping spring rubbersheet II-1-6. The upper end of the damping spring II-1-7 is fixed on thedamping spring top seat II-1-5. The lower end of the damping springII-1-7 is fixed on a spring seat II-1-8. A spring seat support blockII-1-9 is installed on the lower end of the spring seat II-1-8. When aslurry layer is filled to a mold cavity of the belt mold by the scrapingplate, the damping spring can automatically adjust a longitudinal forceapplied to the scraping plate. The spring seat II-1-8, the spring seatsupport block II-1-9, the damping spring tail seat II-1-10, thetriangular support plate II-1-13 and the scraping plate II-1-14 areconnected by damping spring screws II-1-11.

As shown in FIG. 30, the belt mold I-1 moves rightwards at a step speedV. A mold release agent III-2 is already coated into the mold cavity ofthe belt mold. The front side of the scraping plate II-1-14 is alreadycoated with the slurry layer. A slope of the scraping plate squeezes theslurry into the mold cavity, and a bottom plane of the scraping platescreeds and compacts the slurry.

As shown in FIG. 31 which is an assembly diagram of a second screedingmechanism, the second screeding mechanism includes a second screedingmechanism main support IV-1, a second screeding plate IV-2, a secondsuspension component and a torsion spring adjusting component. Thesecond screeding mechanism main support, the second screeding plate andthe second suspension component have the same structures as that of thefirst screeding mechanism.

As shown in FIG. 32 which is an isometric drawing of the secondscreeding plate and a lead screw guide rail group and in FIG. 33 whichis an exploded view of the second screeding plate and the lead screwguide rail group, a longitudinal guide rail IV-2-4 is fixed on alongitudinal guide rail fixing sectional bar 1 IV-2-1 through alongitudinal guide rail fixing bolt IV-2-2. The longitudinal guide railfixing sectional bar IV-2-1 is fixed on a stander through an angle plateIV-2-16, and a longitudinal adjusting plate IV-2-5 is fixed on thelongitudinal guide rail IV-2-4 through a longitudinal adjusting platebolt IV-2-6. A torsion spring baffle plate IV-2-10 is fixed on atriangular support frame IV-2-9 through a torsion spring baffle platebolt IV-2-7.

A torsion spring adjusting plate IV-2-13 is connected with the torsionspring baffle plate IV-2-10 through a hinge IV-2-12. The torsion springadjusting plate IV-2-13 is fixed on a longitudinal adjusting plateIV-2-5 through a torsion spring adjusting plate bolt IV-2-14. Since thetorsion spring adjusting plate is fixed, when a torsion spring works,the position of the torsion sprig baffle plate may be adjusted. A shaftend of a torsion spring support shaft IV-2-15 is matched with a nut andfixed on the longitudinal adjusting plate IV-2-5. Torsion springsIV-2-11 are installed on the torsion spring support shaft IV-2-15. Thetorsion springs are isolated by a sleeve IV-2-8. An appropriate quantityof the torsion springs may be installed according to an actualsituation.

Embodiment 2

A slurry coating and screeding apparatus used in a production process ofSG abrasive includes injector coating mechanisms I and a slurryscreeding mechanism I.

The injector coating mechanisms I and the slurry screeding mechanism IIare arranged above a belt mold III. A plurality of the injector coatingmechanisms I may be arranged.

In the present embodiment, the screeding mechanism is a first screedingmechanism in FIG. 22 or a second screeding mechanism in FIG. 31.

As shown in FIG. 3 which is a front view of an injector left sidesupport frame, in FIG. 5 which is an exploded view of an injectorlifting component, in FIG. 6 which is an exploded view of a synchronousbelt control apparatus, in FIG. 7 which is an isometric drawing of amotor 2 fixing block, and in FIG. 10 which is a sectional view showing aconnection between a lead screw and a guide rail, the injector coatingmechanism I includes an injector support frame I-1 and an injector I-2.The injector support frame is in a door shape. The injector supportframe has a set distance from a screeding mechanism support frame. Theinjector support frame I-1 includes two groups of support framesectional bars I-1-11 which are vertically disposed and a transversesupport sectional bar I-1-31 connecting the two side support framesectional bars I-1-11. The support frame sectional bar I-1-11 on oneside is connected through an injector left side support frame angleplate I-1-2, and a support frame angle support I-1-13 fixes the injectorcoating apparatus onto a stander. A motor 2 I-1-26 is connected with themotor 2 fixing block I-1-7 through screws. The motor 2 I-1-26 is fixedlyconnected with a synchronous belt pulley I-1-25 through a secondtightening screw I-1-24. A rectilinear bearing 1 I-1-5, a rectilinearbearing 2 I-1-22 and a rectilinear bearing 1 fixing ring I-1-6 areinstalled in rectilinear bearing holes of the motor 1 fixing blockI-1-7. The lower end of each rectilinear bearing is positioned by thebottom of each bearing hole, and the upper end is positioned by a leadscrew nut 1 I-1-4. The lead screw nut 1 I-1-4 is fixed on the motor 1fixing block I-1-7 through a lead screw nut fixing screw I-1-21 andmatched with a lead screw I-1-20. The lead screw rotates to drive thelead screw nut 1 I-1-4 to move, i.e. the motor 2 fixing block I-1-7 andparts connected to the fixing block can be driven to move. A motor 1I-1-10 is fixed on a motor 1 positioning plate I-1-17 through a motor 1fixing plate bolt I-1-9. The motor 1 positioning plate I-1-17 is fixedon the support frame sectional bar I-1-11 through screws. The lead screwI-1-20 is connected with a shaft end of the motor 1 I-1-10 through acoupler 1 I-1-8. The guide rail 1 I-1-3 is fixed in a guide rail hole ofthe motor 1 positioning plate I-1-17. When the motor 1 rotates, the leadscrew may be driven to rotate.

A distance from the injector cylinder plug to the belt mold may beminimized as far as possible, so that the completeness of the slurrylayer may be protected, and the abrasive with complete shape can beconveniently obtained. The specific structures of the motor 1 fixingblock and the motor 2 fixing block are not defined in detail. The motor1 positioning plate I-1-17 is provided with vertical guide rail holesmatched with the guide rail 1. The motor 2 fixing block I-1-7 isprovided with transverse guide rail holes matched with the guide rail 3.The synchronous belt positioning block is provided with guide rail holesmatched with the guide rail 1. Side portions of the transverse guiderail holes of the motor 2 fixing block and guide rail holes of thesynchronous belt positioning block are respectively provided with openslots, so that the guide rail holes can move along the correspondingguide rail. The motor 2 fixing block is provided with a synchronous beltpulley and a synchronous motor. The synchronous belt positioning blockis provided with a synchronous belt positioning wheel. One end of asynchronous belt is connected to the synchronous belt pulley, and theother end is fixed by the synchronous belt pulley. Since synchronousbelt teeth are arranged in an injector support slide block, thesynchronous belt passes through the injector support slide block, andwhen the motor 3 rotates, the support slide block can be driven to moveso as to drive the injector to move transversely. The motor 3 drives aninjector lead screw to rotate through the coupler to further drive theinjector lead screw nut to move up and down. Since the injector pistonis connected with the injector lead screw nut through a threaded rod,the injector piston is driven to move, and the slurry in the injectorcylinder is extruded out.

The injector moves transversely, so that the abrasive slurry is coatedonto the belt mold in a reciprocating manner, and m groups of injectorcoating apparatuses (two groups are provided in FIG. 1) may be installedin front of the screeding apparatus. The slurry layer coated by theinjector that moves once has a width of d and a thickness of h. Adistance among the injector coating apparatuses is even-number times ofd, so that when the injector reciprocates for n (n is an even number)times, the distance is increased by even-number times, and the abrasiveslurry is convenient to fed from one side of a material inlet of theinjector cylinder. The abrasive slurry can be injected in time from thematerial inlet of the cylinder according to the residue in the injectorcylinder, and the abrasive slurry can be injected by equipment such asan injection pump. A step distance of the belt mold may be presetaccording to a total width of continuous slurry in front of thescreeding apparatus, and the total width depends on a number of groupsof installed injectors and a coating width before the next injection ofa single group of injectors.

As shown in FIG. 4 which is a front view of an injector right sidesupport frame, and in FIG. 9 which is an exploded view of a synchronousbelt positioning apparatus, a rectilinear bearing and a lead screw nutwhich are the same as those of a motor 2 fixing block I-1-7 areinstalled in a synchronous belt positioning block I-1-15. Thesynchronous belt positioning belt I-1-16 is fixed on the synchronousbelt positioning block I-1-15 through a pin shaft I-1-18 and a splitpin. One end of the synchronous belt is driven by the synchronous beltpulley, and the other end is fixed by the synchronous belt positioningblock.

As shown in FIG. 11 which is a front view of an injector support frame,in FIG. 12 which is an exploded view of an injector support slide blockand a transverse guide rail, and in FIG. 13(a) to FIG. 13(c) which are afront view, side view and inner side schematic diagram of the injectorsupport slide block, the injector is fixed on the injector support slideblocks I-1-28. The two injector support slide blocks I-1-28 areconnected with a guide rail 3 I-1-27 through injector support slideblock bolts I-1-30. An injector lower framework I-2-12 is provided withbolt holes. The injector support slide block bolts connect the injectorlower framework I-2-12 and the injector support slide blocks I-1-28. Therectilinear bearing 3 I-1-32 is installed between the two injectorsupport slide blocks. Two axial ends of the guide rail 3 I-1-27 arefixed in guide rail holes of the synchronous belt positioning blockI-1-15 and the motor 2 fixing block I-1-7 respectively. The injectorsupport slide block can slide along the direction of the guide rail 3.Synchronous belt engaging teeth are arranged in the injector supportslide block I-1-28 and can be matched with the synchronous belt I-1-29.When the synchronous belt rotates, the injector support slide block canbe driven to move.

It should be noted that the injector support slide block includes twobutt-jointed halves. The inner sides of the two halves are provided withgrooves for receiving the guide rail 3.

As shown in FIG. 14 which is an exploded view of an injector, in FIG. 15which is a full sectional view of the injector, in FIG. 16(a) which is aside view of an injector lower framework, in FIG. 16(b) which is a halfsectional view of the injector lower framework, in FIG. 17 which is anisometric drawing of an injector upper framework, in FIG. 18 which is anisometric drawing of an injector cylinder plug, in FIG. 19 which is anisometric drawing of an injector cylinder, in FIG. 20 which is anisometric drawing of a thrust bearing seat, and in FIG. 21 which is anisometric drawing of an injector piston, the motor 3 I-2-1 is fixed onthe injector upper framework I-2-3 through a motor fixing bolt I-2-2.The injector upper framework I-2-3 is connected with an injector lowerframework I-2-12 through an upper framework bolt I-2-5. A shaft end ofthe motor 3 I-2-1 is connected with an injector lead screw I-2-19through a coupler 2 I-2-4. A shaft shoulder of an injector lead screwI-2-19 is fixed by the thrust bearing I-2-8. The lower end of the thrustbearing I-2-8 is positioned by the thrust bearing seat I-2-9, and theupper portion is fixed by the upper framework bolt I-2-5. The upperframework bolt I-2-5 is fixed on the thrust bearing seat I-2-9 throughan upper fixing ring bolt of the injector lead screw I-2-6. The lowerend of the thrust bearing seat I-2-9 is positioned by a boss in theinjector cylinder I-2-14. The upper end of the thrust bearing seat I-2-9is fixed by the injector upper framework I-2-3. The injector lead screwI-2-19 is provided with an injector lead screw nut I-2-10. A thrustbearing sealing seal ring I-2-18 is installed in the thrust bearing seatI-2-9. The injector lead screw nut I-2-10 is provided with four pushrods I-2-16. The lower ends of the push rods I-2-16 are fixed on theinjector piston I-2-15. The injector lead screw nut moves to drive thepush rods and the injector piston to move. An injector lead screw nutlower retainer ring I-2-11 is fixed on the lower end of the injectorlead screw I-2-19 through an injector lead screw nut lower retainer ring1-2-17. A rubber ring I-2-20 is sleeved in an injector piston ringgroove. The rubber ring can ensure the tightness when the slurry isextruded, so that the slurry is prevented from entering a space abovethe injector piston. The injector cylinder plug I-2-13 is connected withthe injector cylinder I-2-14 by threads. The lower end of the injectorcylinder plug I-2-13 is positioned by a bottom boss of the injectorlower framework I-2-12. When the injector piston extrudes the slurry,the slurry may be extruded out from an opening of the injector cylinderplug, and may be coated on the belt mold in a layering slurry form.

As shown in FIG. 34 which is an assembly diagram of a residue cleaningmechanism, the residue cleaning mechanism consists of a cleanser supportframe V-1 and a cleanser V-2. The cleanser support frame V-1 is in adoor shape and is arranged at the rear side of the screeding mechanism.

As shown in FIG. 35 which is an exploded view of the residue cleaningmechanism and in FIG. 36 which is an isometric drawing of the residuecleaning mechanism, a cleanser transverse lead screw fixing sectionalbar V-2-14 is connected with two side sectional bars through angleplates. A cleanser guide rail V-2-1 is fixedly connected onto thecleanser transverse lead screw fixing sectional bar V-2-14 throughbolts. A hinge plate V-2-3 is connected with a cleanser slide blockV-2-2 through the bolts. When the cleanser slide block moves, the hingeplate may be driven to move. A hinge bolt V-2-4 connects a cleanserslide block V-2-2 and a cleanser transverse lead screw nut fixing plateV-2-6. Hinge holes of a cleaning plate connecting plate V-2-7 arematched with the hinge bolts V-2-4 to form rotation pairs. One end of anextension spring V-2-8 is connected with the hinge bolt V-2-4, and theother end is connected with a spring hinge pin V-2-13. The cleaningplate connecting plate V-2-7 and the cleaning plate V-2-12 are connectedthrough the cleaning plate connecting plate bolt V-2-9. When thecleaning plate works, the extension spring adjusts a length of thespring according to an actual working condition so as to adjust anacting force of the cleaning plate on the surface of the belt mold intime. The cleanser transverse lead screw nut bolt V-2-11 fixes thecleanser transverse lead screw nut V-2-10 onto the cleanser transverselead screw nut fixing plate V-2-6. The lead screw nut moves to drive thecleanser transverse lead screw nut fixing plate to move so as to furtherdrive the cleaning plate to move. The cleanser transverse lead screwfixing sectional bar V-2-19 is fixed on the cleanser connectingsectional bar V-2-17 through the angle plate. The motor 6 V-2-16 isfixed on the cleanser connecting sectional bar V-2-17 through the motor6 fixing plate V-2-15. The cleanser transverse lead screw support seatV-2-18 is fixedly connected onto the cleanser transverse lead screwfixing sectional bar V-2-19 through the bolts. When the motor 6 rotates,the cleanser transverse lead screw can be driven to rotate.

As shown in FIG. 37 which is an isometric drawing of a residue cleaningmechanism support frame, the lead screw support seat 2 V-1-1 and themotor 4 fixing plate V-1-6 are fixed on the residue cleaning mechanismsupport sectional bar V-1-8 through the bolts. The motor 4 V-1-7 isconnected with the motor 4 fixing plate V-1-6 through the bolts. A shaftend of the motor 4 V-1-7 is connected with a lead screw 2 V-1-3 througha coupler 2 V-1-5. The lead screw nut fixing plate V-1-2 is connectedwith a cleanser lifting component V-1-4 through the bolts. The leadscrew nut moves to drive the cleanser lifting component to move. Thecleanser connecting sectional bar V-2-17 is connected with the cleanserlifting component V-1-4 through screws. When the lifting part moves, thecleanser connecting sectional bar can be driven to move, i.e. thecleanser is driven to rise and fall. In the advancing process, thelifting mechanism falls, and when the cleanser returns, the liftingmechanism rises.

The above only describes preferred embodiments of the present inventionand is not intended to limit the present invention. Variousmodifications and changes may be made to the present invention by thoseskilled in the art. Any modification, equivalent substitution,improvement, etc. made within the spirit and principles of the presentinvention shall be included within the protection scope of the presentinvention.

We claim:
 1. A slurry screeding mechanism used in an S abrasiveproduction process, comprising: a screeding main support; a screedingplate, wherein the screeding plate is connected with the screeding mainsupport through a suspension component, so that the screeding plate issuspended, and a damping spring is arranged in the suspension component;a torsion spring adjusting component, wherein the torsion springadjusting component comprises a plurality of torsion springs supportedby a torsion spring support shaft, the torsion spring support shaft isfixed on the screeding main support, the torsion spring support shaftcan move up and down relative to the screeding main support, the torsionsprings are clamped in a V-shaped plate, an end side of the V-shapedplate is connected with the screeding main support, and a side surfaceof the V-shaped plate is connected with the screeding plate.
 2. Theslurry screeding mechanism used in an SG abrasive production processaccording to claim 1, wherein the screeding plate comprises a triangularsupport plate and a scraping plate fixed on a lower portion of thetriangular support plate; a long edge of the triangular support plate isarranged along a length direction of the screeding main support; thescraping plate is a V-shaped scraping plate and arranged on lowerportions of two short edges of the triangular support plate; a bottomside of the scraping plate is a plane; and a longitudinal section of thescraping plate is a rectangle with a missed angle on one side.
 3. Theslurry screeding mechanism used in an SG abrasive production processaccording to claim 1, wherein the suspension component comprises asuspension connecting member connected with the screeding main support;a height of the suspension connecting member is adjustable; and thedamping spring is arranged below the suspension connecting member. 4.The slurry screeding mechanism used in an SG abrasive production processaccording to claim 3, wherein the damping spring is arranged in adamping spring seat; the top of the damping spring seat is connectedwith the suspension connecting member, and the bottom of the dampingspring seat is connected with the screeding plate; the suspensionconnecting member comprises a suspension outer side connecting memberand a suspension inner side connecting member embedded in the suspensionouter side connecting member; the suspension outer side connectingmember is connected with the screeding main support; the bottom side ofthe suspension inner side connecting member is connected with the top ofthe damping spring seat; one of the suspension outer side connectingmember and the suspension inner side connecting member is provided witha slotted hole, and the other one is provided with a plurality of boltholes.
 5. The slurry screeding mechanism used in an SG abrasiveproduction process according to claim 1, wherein the V-shaped platecomprises a torsion spring adjusting plate and a torsion spring baffleplate hinged with the torsion spring adjusting plate; the torsion springbaffle plate is arranged below the torsion springs; and the torsionspring baffle plate is connected with the screeding plate; the screedingmain support is provided with a longitudinal guide rail; thelongitudinal guide rail is sleeved with a longitudinal slide block; thelongitudinal slide block is connected with a longitudinal adjustingplate which is vertically arranged; the longitudinal adjusting plate isconnected with an end portion of the torsion spring adjusting plate; andboth ends of the torsion spring support shaft are connected with thelongitudinal adjusting plate.
 6. A slurry coating and screedingapparatus used in a production process of SG abrasive, comprising: aninjector coating mechanism which stretches across a belt mold transferline and comprises an injector for injecting slurry to a belt mold; thescreeding mechanism of any one of claim 1, wherein the screedingmechanism is arranged at one side of the injector coating mechanism, andthe screeding mechanism is also disposed along the belt mold transferline.
 7. The slurry coating and screeding apparatus used in a productionprocess of SG abrasive according to claim 6, wherein the slurry coatingand screeding apparatus used in the production process of the SGabrasive further comprises a residue cleaning mechanism; the screedingmechanism is arranged between the injector coating mechanism and theresidue cleaning mechanism; the residue cleaning mechanism comprises acleanser support frame which stretches across the belt mold transferline; and the cleanser support frame supports a cleanser.
 8. The slurrycoating and screeding apparatus used in a production process of SGabrasive according to claim 7, wherein the cleanser comprises a cleaningplate with a bottom capable of contacting the belt mold; the cleaningplate is connected with a cleaning moving component through theextension spring; the cleaning moving component is connected with acleaning lifting component supported by the cleanser support frame; thecleaning moving component drives the cleaning plate to move along awidth direction of the belt mold; and the cleaning lifting componentdrives the cleaning plate to rise and fall.
 9. The slurry coating andscreeding apparatus used in a production process of SG abrasiveaccording to claim 6, wherein the injector coating mechanism comprisesan injector support frame; the injector support frame supports the guiderail; the injector is installed on the guide rail; the guide rail isconnected with an injector lifting component; and the guide rail isconnected with an injector horizontal moving component; the injectorcomprises an injector cylinder connected with the guide rail; the sideportion of the injector cylinder is provided with a slurry inlet; thebottom side of the injector cylinder is provided with a slurry outlet;an injector piston is arranged in the injector cylinder, and theinjector piston is connected with a rectilinear propelling component.10. The slurry coating and screeding apparatus used in a productionprocess of SG abrasive according to claim 6, wherein the screedingmechanism may be replaced as a first screeding mechanism comprising ascreeding main support and a screeding plate; the screeding plate isconnected with the screeding main support through a suspensioncomponent, so that the screeding plate is suspended; and a dampingspring is arranged in the suspension component.